Recovering from a breakdown after her mother’s death, Ingrid reboots her life in Southern California. Once established there, her addictive habit of stalking Instagram stars returns with a vengeance. Spicer conveys her dependence on technology as a kind of moral listlessness, the way Spike Jonze did in Her. Ingrid’s handheld device doesn’t just contain an infinite number of selfies — it’s accommodated the migration of her soul. Plaza’s on-screen presence always carries a certain degree of malice. She is the rightful heir to Wednesday Addams’ death’s-head glare. But when Ingrid collides with Nicky (Billy Magnussen), the brother of someone she’s obsessed with, his Nordic volatility disrupts her ability to menace. He reads her at a party and instantly zeroes in on her vulnerabilities. Nicky and Ingrid are natural enemies. When he steals her phone, she will either get it back or die trying.